Acceptance criterion

To demonstrate Jasmine support of asynchronous testing, we are going to implement the following acceptance criterion:

Stock when fetched, should update its share price

Using the techniques we have showed you until now, you could write this acceptance criterion in StockSpec.js, inside the spec folder file, as follows:

describe("Stock", function() {
  var stock;
  var originalSharePrice = 0;

  beforeEach(function() {
    stock = new Stock({
      symbol: 'AOUE',
      sharePrice: originalSharePrice
    });
  });

  it("should have a share price", function() {
    expect(stock.sharePrice).toEqual(originalSharePrice);
  });

  describe("when fetched", function() {
    var fetched = false;
    beforeEach(function() {
      stock.fetch();
    });

    it("should update its share price", function() {
      expect(stock.sharePrice).toEqual(20.18);
    });
  });
});

That would lead to the implementation of the fetch function from...